Greg Robinson reluctantly repairs NASA's James Webb Space Telescope - La Ronge Northerner | Canada News Media
Connect with us

Science

Greg Robinson reluctantly repairs NASA's James Webb Space Telescope – La Ronge Northerner

Published

 on


In 2018, the James Webb Space Telescope, the embattled project to build an instrument that could look at the oldest stars in the universe, appeared to be derailed. second.

The parts and instruments of the telescope were complete, but they had to be assembled and tested. The launch date was slipping further into the future, and costs, already approaching $8 billion, were rising again. Congress, which had provided several large batches of funding over the years, was unhappy that NASA was asking for more money.

That’s when Gregory Robinson was asked to take over as Web Program Director.

At the time, Mr. Robinson was Associate Deputy Administrator for Programs at NASA, which put him in charge of evaluating the performance of more than 100 science missions.

He said no. “I was enjoying my work at the time,” Mr. Robinson recalls.

Thomas Zurbuchen, NASA associate administrator for science, asked him again.

“He had a kind of confluence of two skills,” Dr. Zurbuchen said of Mr. Robinson. “The first is that he has seen many projects, including projects that have been in trouble. And the second piece is that he has the business of gaining trust between people. So he can get into a room, he can sit in the cafeteria, and by the time he leaves the cafeteria, he knows half the people.”

In the end, Mr. Robinson relented. In March 2018, he embarked on a mission to get the telescope back on track and into space.

“He twisted my arm to control Webb,” said Mr. Robinson.

His path to this role seemed unlikely.

At NASA, Mr. Robinson, 62, is a rarity: a black man among the agency’s top managers.

“The people who see me in this role are definitely an inspiration, and it’s also an acknowledgment that they could be there too,” he said.

He says there are many black engineers working at NASA now, but “certainly not as many as they should be” and most of them haven’t risen to a high enough level for the public to see, for example participating in press conferences as Mr. Robinson has followed up on Webb’s launch.

“We have a lot of things we’re trying to improve,” Mr. Robinson said.

Born in Danville, Virginia, along the state’s southern edge, he was the ninth of 11 children. His parents were tobacco farmers. He attended an elementary school for black children through fifth grade, when the school district was finally incorporated in 1970.

He was the only one in his family who pursued science and mathematics, with a football scholarship on his way to Virginia Union University in Richmond. He later transferred to Howard University. He received a BA in Mathematics from Virginia Union, and a BS in Electrical Engineering from Howard.

He began working at NASA in 1989, following up on some friends who already worked there. Over the years, his jobs have included Deputy Director of NASA’s Glenn Research Center in Cleveland, and Deputy Chief Engineer.

Webb’s assignment came amid poor publicity for the project.

The launch target date has been pushed back again, to May 2020 as of 2019. And NASA has created a review board of outside experts to advise on what needs to be done to get Webb to the finish line.

A month into Mr. Robinson’s term, a failed test provided a vivid illustration of the need for reform.

The spacecraft must withstand the strong vibrations of launch, so engineers test it by shaking it. When Webb shook, awkwardly, the bolts holding the telescope’s huge, fragile sun-shield cover exploded.

“It set us back months – about 10 months – that’s the only thing,” Mr. Robinson said. The launch date has been pushed back to March 2021, and the price has gone up by another $800 million.

The accident looked like a re Previous issues encountered by the Webb . project. When the Webb telescope was named in 2002, it had a projected budget of $1 billion to $3.5 billion for a launch early in 2010. When 2010 arrived, the launch date moved to 2014, and the telescope’s estimated costs rose to $5.1 billion . . After reviews found both the budget and schedule to be unrealistic, in 2011 NASA reset the program with a much higher budget of just $8 billion and a launch date of October 2018.

For several years after the 2011 reset, the software appeared to be in good shape. “They were cutting milestones,” Mr. Robinson said. “Really good table margin.”

But he added, “Things happen there that you don’t see. Ghosts always catch you, don’t they?”

For bolts that came off during vibration testing, it turned out that the engineering drawings did not specify how much torque to apply. That was left to the contractor, Northrop Grumman, to decide, and it wasn’t tight enough.

“You have to have specifications to make sure they are correct,” Mr. Robinson said.

The review board released its report, noted a series of issues, and made 32 recommendations. Mr. Robinson said that NASA followed them all.

One recommendation was to conduct an audit of the entire spacecraft to identify “embedded problems” – errors that went unnoticed.

Engineers checked blueprints and specifications. They have considered requisitions to ensure that what was ordered met specifications and that the suppliers provided the correct items.

“Multiple teams have been formed, led by the most experienced people,” Mr. Robinson said. “They really dug into the paperwork.”

For the most part, the hardware actually matches what was originally designed. Some things didn’t match – Mr. Robinson said none of them would lead to a fiasco – and those things were fixed.

When Mr. Robinson took over as program director, the efficiency of Webb’s schedule — a measure of how quickly work was done compared to what was planned — fell by about 55 percent, Dr. Zurbuchen said. It was, in large part, the result of human error that could have been avoided.

Dr. Zurbuchen said Webb’s team was full of smart and skilled people who had become wary of raising criticism. I credit Mr. Robinson with turning things around. Within a few months, efficiency reached 95 percent, with communications improved and managers more willing to share potential bad news.

“I needed someone who could get the team’s trust, and what we needed to find out was what was wrong with the team,” said Dr. Zurbuchen. “The speed at which he ran this thing was amazing.”

However, a number of new issues caused additional delays and cost overruns. Some, like the pandemic and a payload bay problem on the European-made Ariane 5 missile, were out of Mr. Robinson’s control. Additional human errors occurred, such as last November when the clamp securing the telescope to the launch mount broke, causing the telescope to vibrate without causing damage.

But when Webb’s Ariane 5 finally launched at Christmas, everything went without a hitch, and publishing since then has gone smoothly.

With the onset of feedback, the Webb Administrator will soon no longer be needed.

Mr. Robinson says, proudly, that he worked himself without a job.

“Explorer. Unapologetic entrepreneur. Alcohol fanatic. Certified writer. Wannabe tv evangelist. Twitter fanatic. Student. Web scholar. Travel buff.”

Adblock test (Why?)



Source link

Continue Reading

News

Here’s how Helene and other storms dumped a whopping 40 trillion gallons of rain on the South

Published

 on

 

More than 40 trillion gallons of rain drenched the Southeast United States in the last week from Hurricane Helene and a run-of-the-mill rainstorm that sloshed in ahead of it — an unheard of amount of water that has stunned experts.

That’s enough to fill the Dallas Cowboys’ stadium 51,000 times, or Lake Tahoe just once. If it was concentrated just on the state of North Carolina that much water would be 3.5 feet deep (more than 1 meter). It’s enough to fill more than 60 million Olympic-size swimming pools.

“That’s an astronomical amount of precipitation,” said Ed Clark, head of the National Oceanic and Atmospheric Administration’s National Water Center in Tuscaloosa, Alabama. “I have not seen something in my 25 years of working at the weather service that is this geographically large of an extent and the sheer volume of water that fell from the sky.”

The flood damage from the rain is apocalyptic, meteorologists said. More than 100 people are dead, according to officials.

Private meteorologist Ryan Maue, a former NOAA chief scientist, calculated the amount of rain, using precipitation measurements made in 2.5-mile-by-2.5 mile grids as measured by satellites and ground observations. He came up with 40 trillion gallons through Sunday for the eastern United States, with 20 trillion gallons of that hitting just Georgia, Tennessee, the Carolinas and Florida from Hurricane Helene.

Clark did the calculations independently and said the 40 trillion gallon figure (151 trillion liters) is about right and, if anything, conservative. Maue said maybe 1 to 2 trillion more gallons of rain had fallen, much if it in Virginia, since his calculations.

Clark, who spends much of his work on issues of shrinking western water supplies, said to put the amount of rain in perspective, it’s more than twice the combined amount of water stored by two key Colorado River basin reservoirs: Lake Powell and Lake Mead.

Several meteorologists said this was a combination of two, maybe three storm systems. Before Helene struck, rain had fallen heavily for days because a low pressure system had “cut off” from the jet stream — which moves weather systems along west to east — and stalled over the Southeast. That funneled plenty of warm water from the Gulf of Mexico. And a storm that fell just short of named status parked along North Carolina’s Atlantic coast, dumping as much as 20 inches of rain, said North Carolina state climatologist Kathie Dello.

Then add Helene, one of the largest storms in the last couple decades and one that held plenty of rain because it was young and moved fast before it hit the Appalachians, said University of Albany hurricane expert Kristen Corbosiero.

“It was not just a perfect storm, but it was a combination of multiple storms that that led to the enormous amount of rain,” Maue said. “That collected at high elevation, we’re talking 3,000 to 6000 feet. And when you drop trillions of gallons on a mountain, that has to go down.”

The fact that these storms hit the mountains made everything worse, and not just because of runoff. The interaction between the mountains and the storm systems wrings more moisture out of the air, Clark, Maue and Corbosiero said.

North Carolina weather officials said their top measurement total was 31.33 inches in the tiny town of Busick. Mount Mitchell also got more than 2 feet of rainfall.

Before 2017’s Hurricane Harvey, “I said to our colleagues, you know, I never thought in my career that we would measure rainfall in feet,” Clark said. “And after Harvey, Florence, the more isolated events in eastern Kentucky, portions of South Dakota. We’re seeing events year in and year out where we are measuring rainfall in feet.”

Storms are getting wetter as the climate change s, said Corbosiero and Dello. A basic law of physics says the air holds nearly 4% more moisture for every degree Fahrenheit warmer (7% for every degree Celsius) and the world has warmed more than 2 degrees (1.2 degrees Celsius) since pre-industrial times.

Corbosiero said meteorologists are vigorously debating how much of Helene is due to worsening climate change and how much is random.

For Dello, the “fingerprints of climate change” were clear.

“We’ve seen tropical storm impacts in western North Carolina. But these storms are wetter and these storms are warmer. And there would have been a time when a tropical storm would have been heading toward North Carolina and would have caused some rain and some damage, but not apocalyptic destruction. ”

___

Follow AP’s climate coverage at https://apnews.com/hub/climate

___

Follow Seth Borenstein on Twitter at @borenbears

___

Associated Press climate and environmental coverage receives support from several private foundations. See more about AP’s climate initiative here. The AP is solely responsible for all content.

Source link

Continue Reading

Science

‘Big Sam’: Paleontologists unearth giant skull of Pachyrhinosaurus in Alberta

Published

 on

 

It’s a dinosaur that roamed Alberta’s badlands more than 70 million years ago, sporting a big, bumpy, bony head the size of a baby elephant.

On Wednesday, paleontologists near Grande Prairie pulled its 272-kilogram skull from the ground.

They call it “Big Sam.”

The adult Pachyrhinosaurus is the second plant-eating dinosaur to be unearthed from a dense bonebed belonging to a herd that died together on the edge of a valley that now sits 450 kilometres northwest of Edmonton.

It didn’t die alone.

“We have hundreds of juvenile bones in the bonebed, so we know that there are many babies and some adults among all of the big adults,” Emily Bamforth, a paleontologist with the nearby Philip J. Currie Dinosaur Museum, said in an interview on the way to the dig site.

She described the horned Pachyrhinosaurus as “the smaller, older cousin of the triceratops.”

“This species of dinosaur is endemic to the Grand Prairie area, so it’s found here and nowhere else in the world. They are … kind of about the size of an Indian elephant and a rhino,” she added.

The head alone, she said, is about the size of a baby elephant.

The discovery was a long time coming.

The bonebed was first discovered by a high school teacher out for a walk about 50 years ago. It took the teacher a decade to get anyone from southern Alberta to come to take a look.

“At the time, sort of in the ’70s and ’80s, paleontology in northern Alberta was virtually unknown,” said Bamforth.

When paleontogists eventually got to the site, Bamforth said, they learned “it’s actually one of the densest dinosaur bonebeds in North America.”

“It contains about 100 to 300 bones per square metre,” she said.

Paleontologists have been at the site sporadically ever since, combing through bones belonging to turtles, dinosaurs and lizards. Sixteen years ago, they discovered a large skull of an approximately 30-year-old Pachyrhinosaurus, which is now at the museum.

About a year ago, they found the second adult: Big Sam.

Bamforth said both dinosaurs are believed to have been the elders in the herd.

“Their distinguishing feature is that, instead of having a horn on their nose like a triceratops, they had this big, bony bump called a boss. And they have big, bony bumps over their eyes as well,” she said.

“It makes them look a little strange. It’s the one dinosaur that if you find it, it’s the only possible thing it can be.”

The genders of the two adults are unknown.

Bamforth said the extraction was difficult because Big Sam was intertwined in a cluster of about 300 other bones.

The skull was found upside down, “as if the animal was lying on its back,” but was well preserved, she said.

She said the excavation process involved putting plaster on the skull and wooden planks around if for stability. From there, it was lifted out — very carefully — with a crane, and was to be shipped on a trolley to the museum for study.

“I have extracted skulls in the past. This is probably the biggest one I’ve ever done though,” said Bamforth.

“It’s pretty exciting.”

This report by The Canadian Press was first published Sept. 25, 2024.

The Canadian Press. All rights reserved.

Source link

Continue Reading

News

The ancient jar smashed by a 4-year-old is back on display at an Israeli museum after repair

Published

 on

 

TEL AVIV, Israel (AP) — A rare Bronze-Era jar accidentally smashed by a 4-year-old visiting a museum was back on display Wednesday after restoration experts were able to carefully piece the artifact back together.

Last month, a family from northern Israel was visiting the museum when their youngest son tipped over the jar, which smashed into pieces.

Alex Geller, the boy’s father, said his son — the youngest of three — is exceptionally curious, and that the moment he heard the crash, “please let that not be my child” was the first thought that raced through his head.

The jar has been on display at the Hecht Museum in Haifa for 35 years. It was one of the only containers of its size and from that period still complete when it was discovered.

The Bronze Age jar is one of many artifacts exhibited out in the open, part of the Hecht Museum’s vision of letting visitors explore history without glass barriers, said Inbal Rivlin, the director of the museum, which is associated with Haifa University in northern Israel.

It was likely used to hold wine or oil, and dates back to between 2200 and 1500 B.C.

Rivlin and the museum decided to turn the moment, which captured international attention, into a teaching moment, inviting the Geller family back for a special visit and hands-on activity to illustrate the restoration process.

Rivlin added that the incident provided a welcome distraction from the ongoing war in Gaza. “Well, he’s just a kid. So I think that somehow it touches the heart of the people in Israel and around the world,“ said Rivlin.

Roee Shafir, a restoration expert at the museum, said the repairs would be fairly simple, as the pieces were from a single, complete jar. Archaeologists often face the more daunting task of sifting through piles of shards from multiple objects and trying to piece them together.

Experts used 3D technology, hi-resolution videos, and special glue to painstakingly reconstruct the large jar.

Less than two weeks after it broke, the jar went back on display at the museum. The gluing process left small hairline cracks, and a few pieces are missing, but the jar’s impressive size remains.

The only noticeable difference in the exhibit was a new sign reading “please don’t touch.”

The Canadian Press. All rights reserved.

Source link

Continue Reading

Trending

Exit mobile version